201122121111161 has 2 divisors, whose sum is σ = 201122121111162. Its totient is φ = 201122121111160.

The previous prime is 201122121111139. The next prime is 201122121111169. The reversal of 201122121111161 is 161111121221102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148103058457600 + 53019062653561 = 12169760^2 + 7281419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201122121111161 is a prime.

It is not a weakly prime, because it can be changed into another prime (201122121111169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100561060555580 + 100561060555581.

It is an arithmetic number, because the mean of its divisors is an integer number (100561060555581).

Almost surely, 2^{201122121111161} is an apocalyptic number.

It is an amenable number.

201122121111161 is a deficient number, since it is larger than the sum of its proper divisors (1).

201122121111161 is an equidigital number, since it uses as much as digits as its factorization.

201122121111161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 23.

Adding to 201122121111161 its reverse (161111121221102), we get a palindrome (362233242332263).

The spelling of 201122121111161 in words is "two hundred one trillion, one hundred twenty-two billion, one hundred twenty-one million, one hundred eleven thousand, one hundred sixty-one".